package thread;

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.FutureTask;

public class Demo40 {
    public static void main(String[] args) throws InterruptedException, ExecutionException {
        // 通过 FutureTask + Callable(接口) 来实现
        Callable<Integer> call = new Callable<Integer>() {
            @Override
            public Integer call() throws Exception {
                int result = 0;
                for (int i = 1; i <= 1000; i++) {
                    result += i;
                }
                return result;
            }
        };

        // 通过 FutureTask 来将 Thread 与结果连接起来
        FutureTask<Integer> futureTask = new FutureTask<>(call);
        Thread t = new Thread(futureTask);

        t.start();
        t.join();

        System.out.println(futureTask.get());
    }
}
